Tobacco pipe



Patented Mar. 27, 1928.

"UNITED STATES metio GEORGE WILSON, OF LOUISVILLE, KIllNTUCKY.

TOBACCO PIPE.

Application Med February This invention relates to tobacco pipes and has for one of its objects an improved construction in which provisionis made for inducing perfect and even combustion oi the tobacco.

Another object of the invention is to provide means in a tobacco pipe to prevent chocking of the stem channel when the tobacco is compressed in the act of filling the bowl.

.A further object of the invention is the construction of a tobacco pipe having means :for cooling the smoke.

Still another object oi the invention is to provide a tobacco pipe in which the above features are combined to produce a superior smoking appliance both with respect to the healthful and agreeable qualities of the smoke and the unobjectionable character of the combustion products diffused into the atmosphere.

(.lther objects will appear as the following description of a preferred embodiment of the invention develops.

In the drawings :-d

Figure l represents a side elevation of a` tobacco pipe embracing my invention, a part thereof being shown in section.

Figure 2 is a section taken along the line uf-o of Figure 1, and viewed in the direction of the upper arrow.

Figure 3 is a similar section viewed in the direction of the lower arrow.

Figure 4 is a section taken along the line 4-i oit' Figure l.

Referring now in detail to the several ligures, the numeral 1 represents in general the pipe, which consists of the bowl portion E2 and the stem 3. The stem, in the present instance is shown as being detachable from the bowl portion and fitting into a bore 4. therein with a :trictional engagement. The howl portion is provided with a combustion chamber 5 which may be of any desired 'form but is here illustrated as being cylindrical. Near the base of the combustion cl'iamljucr and on that side 'which tacos the stem. the bowl portion is undercut forming a suction or mixing chamber 6, the upper wall 7 of which overhangs said mixing chamber. A stem channel 9 communicates with said mixing chamber and with the bore in the stem of the pipe. An annular groove 12, 1925. serial ne. n.781.

8 is formed in the bowl portion. circunifor-u entially of the comliustion clutmber and near the base thereohsaid groove merging into the upper part oit the mixing chamber.

Tobacco, being non-fluid, will not transmit pressure equally in, all directions, therefore when tobacco is compressed into the com.u bustion chamber in the act ot filling the pipe it will not become equall7 compressed into the mixing chamber (l or the annular groove 8. Stray Hakes ot tobacco may find their way into both ofi these spaces. but in the main the emptiness ot said spaces is preserved so that the suction through the stem channel 9 romains unimpaired by too close packing oi the tobacco. Ample air fior com plete combustion therefore assui'od and. the smoke is drawn without appreciable eiiort through the stem. Perfect and even combos tion is also obtained bv reason oit the tact that the annular groove Si open circumferentiall)T at all points lto the tobacco so that the suction uni'lorin tluroughout the mass of tobacco in the combustion chamber. This is a condition under which the "Formation oi? distillates. such as nicotine and crcosote. will uot take place.- l

It is preferable, in order to obtain a cool smoke. to provide the bowl portion with an air bleed passage l0. '.lhis passage preterably con'imunicatos at one end with the atmosphere and at the other with the mining chamber 6. In account ot the relatioreliT smaller cross sectional area oil the bloed pasW sage l() to the area oil the aunulru groove El exposed to the tobacco in the combustion chamber, the presence oit the bleed 'passage 10 does not materially aii'ect the li=l.lt oif the combustion.

With my improved pipe it ruit necessary that the tobacco be dry, liiecause the adequacy of the air supply makes it possible to use tobacco that is unusually7 moist. Nor is the smoker obliged to relight the pipe at irow quent intervals. since it will burn freely and evenly until all of the tobacco cousiuned. Furthermore, the absence olE the undesirable distillates hereinheiore mentioned, makes it unnecessary "frequently to clean the pipe and prevents it trom heconiiiroj rauh and objectionablc to others 'han the smoker.

It to be understood that uumeroi'ls alterations and changes may be made in the conw struction of the pipe without departing from the scope of the invention as defined by the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent, is

1. A tobacco pipe comprising a stem having a bore and a bowl port-ion having a combustion chamber, the Wall of said combustion chamber being undercut on the side thereof adjacent said stem to lform achamber out of the line of pressure applied to the tobacco in said combustion chamber in filling the pipe7 said combustion chamber having an annular groove above the bottom thereof and Y*merging into said undercut chamber, said bowl portion having an air passage communicating at its outer end with the atmosphere,'the inner ends of saidair passage and said bore communicating with said undercut chamber substantially in the zone of said annular groove.

2. A tobacco pipe comprising a stem having a bore and a bowl portion having a combustion chamber of which the inner end is enlarged at one side thereof and having a circumferential groove in its wall between its inner and outer ends and merging into said enlarged portion, said bowl also having an air passage of which the inner and outer ends communicate, respectively, with said enlarged portion adjacent said groove and with the atmosphere, the inner end of said bore terminating in the enlarged portion of said chamber adjacent said groove.

In testimony whereof I have hereunto set my hand.

GEORGE H. WILSON. 

